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为了考察钢连梁与钢-混凝土组合剪力墙肢端板螺栓连接的抗震性能,考虑不同的连梁跨度和组合墙轴压比,设计并制作了4个1/4缩尺钢连梁与钢-混凝土组合剪力墙连接试件,在保持组合墙体恒定轴压力的情况下,对钢连梁施加竖向往复荷载,比较了试件的受力发展过程和最终破坏形态,分析了试件荷载-位移滞回性能、延性、耗能以及刚度退化等受力特征。结果表明:端板螺栓连接形式能够满足钢连梁与组合剪力墙连接区域的承载力、变形与耗能能力需求,承载力与刚度退化不明显;组合剪力墙边缘预埋钢构件与剪力墙其余部分的连接属薄弱部位,应予以加强;轴压比增大时,连接区域混凝土开裂、剥落现象更严重,峰值荷载、位移延性略有提高;连梁跨度增大时,连接区域参与耗能的程度加大,混凝土破坏会更严重。利用有限元分析软件对试件的荷载-位移骨架曲线进行了数值模拟,数值模拟结果与试验结果吻合良好。
In order to investigate the seismic performance of bolted connections between steel beams and steel-concrete composite shear wall extremities, four 1/4-inch steel beams were designed and fabricated considering different beam spans and axial compression ratios Steel-concrete composite shear wall connection specimen, while maintaining the constant axial pressure of the combined wall, exerting a vertical reciprocating load on the steel beam, comparing the force development process and final failure mode of the specimen, Load-displacement hysteresis, ductility, energy consumption and stiffness degradation and other stress characteristics. The results show that the bolt connection form of end plate can meet the requirements of bearing capacity, deformation and energy dissipation of the connection area between steel beam and composite shear wall, and the bearing capacity and rigidity degradation are not obvious. When the axial compression ratio increases, cracking and spalling of the concrete in the connection area are more serious, and the peak load and displacement ductility slightly increase. When the span of the connecting beam increases, the connection area The extent of energy consumption increases, concrete damage will be more serious. The load-displacement skeleton curves of the specimens were numerically simulated by finite element analysis software. The numerical results agree well with the experimental results.